Electric pocket lamp



May 26, 1936- a. D. LIFSCHITZ ELECTRIC POCKET LAMP Filed April 21, 1934Patented May 26, 1936 EJNITED STATES PATENT, orrior ELECTRIC POCKET LAMPBenjamin Daniel Liischitz, Vienna, Austria, as-

signor of one-half to Egon Singer, Vienna,

' Austria 2 Claims.

This invention relates to electric pocket lamps with removable battery.

According to the invention, the electric pocket lamp comprises incombination a case of insulat- 5 ing material, a resilient contact stripof metal with a screw-thread corresponding to the screwpart of a lamp inthe front part or" the case, a lamp in the forward end of said case and.screwed into said contact strip, and a switch secured to- 10 the caseand controlling the free end of said contact strip.

Two constructions according to the invention are illustrated by way of.example in the accompanying drawing in which Fig. 1 shows a pocket 15lamp in longitudinal section, Fig. 2 is a plan view of the cap of thecase, Fig. 3 shows one of the metal strips and Fig. 4 is a perspectiveview of the other metal strip. Figs. 5 to '7 show another constructionof the pocket lamp, Fig. 5 showing the 20 pocket lamp in longitudinalsection, Fig. 6 is a plan view of the removable bottom end of the caseprovided with one of the metal strips and Fig. 7 is a view of the othermetal strip.

In the construction of the pocket lamp shown 5 in Figs. 1 to 4, the casei, made of insulating material, forms an integral unit with its bottom 2and is closed at the top by a lid in the form of a removable cap 3. Thecap 3 is provided with a wall l, which fits into the casing in such man-30 ner as to provide for its tight closure. A small lamp 5, a resilientstrip or plate of metal 5 and a pivoted lever I acting as a switchdevice are arranged in the cap. The glass bulb of the lamp 5 isaccommodated in a cavity in the cap 3, while 35 the screw of the lamp 5passes through a hole 9 in the cavity and extends freely into theinterior of the cap and casing. For securing the lamp 5, the strip orplate of metal 6 is provided with a circular hole It], the edge of whichis provided 40 with a screw thread i l suited to the thread of the screwof the lamp. The lamp 5 is placed into the cavity 8 of the cap 3 isscrewed into the screw thread H of the metal strip or plate 6, wherebythe lamp as well as the metal strip or plate are 45 connected with eachother and pulled tight at the base of the cavity. Further the metalstrip or plate 6 is provided with two angularly bent resilient wings orlugs l2, provided at the ends, for instance, with pins it or the like.These 5 engage suitable holes in the wall l of the cap 3 and not onlysecure the metal strip or plate 6 when the lamp is screwed out, but alsoserve as spring bolts which engage recesses in the casing l and thushold the cap 3 in position on the casing.

55 The free end of the metal strip or plate 6 is provided with adownwardly and backward bent tongue, which is disposed so as to be aboveone of the terminal contacts of the battery or of one of the cells andcan be depressed into contact with the sameby the switch lever l, whichis rotatable round the pivot It in the cap and moves in a slot in thewall of the case. The end of the lever l, which contacts with the stripor plate 5 preferably consists of insulating material and iswedge-shaped, so that it is maintained in either 10 switch-position bythe resiliency of the metal strip or plate 5.

A battery l5 may be inserted in the case I when the cap 3 is removed.When the case is closed by application of the cap 3, the contact stripit of the battery contacts with the center pole contact of the lamp,while the other terminal ll of the battery becomes connected to thelamp-screw l l and thus to the second pole of the lamp when the metalstrip or plate 6 is depressed into contact with the terminal I! by meansof the switch lever l. The battery is held up with the contact strip itin contact with the lamp socket pole by means of a resilient springmember [8 disposed in the bottom of the casing l.

In place of the battery unit, individual insulated cells wrapped, forinstance, in a strip of paper may be disposed in the case as shown inFig.

5, if the spring member [8 is in the form of a bridgecontact memberadapted to bridge across adjacent cells. As shown in Fig. 1, this bridgemember It comprises two tongues, stamped and bent upwardly from a smallplate shaped to conform to the bottom of the case I; in the case of abattery unit said tongues operate solely as pressure members, while inthe case of individual cells as in Fig. 5, they further serve as bridgecontact interconnecting adjacent cells.

In the construction shown in Figs. 5 to '7, the case i of the pocketlamp and the cap ii are made 40 integral with one another and the bottom2 is made removable. As shown in Fig. 7 of the drawing, the metal plateor strip 5 is in this case provided not with spring wings carrying pinsl3 but only with short lugs I2, which are engaged in suitable holes inthe case and maintain the metal strip in the correct position when thelamp is removed. In this case the switch lever l is rotatable around thepivot M in a slot of the case. The

spring member l8, serving as bridging contact, is 5 secured to thebottom 2 and is preferably provided with two lateral upwardly bentspring arms or lugs 20, each of which carries an outwardly bent tongueor a pin. When the bottom 2 is applied to the case, the said lugs slidealong the 5 inner wall of the latter until their pins on the arms 20engage openings in the Wall of the casing and thus secure the bottom inits closing position.

The rim of the cap 3 in Fig. 1 is of such dimensions that its wall 4provides a shoulder forming a stop for the battery or the cells, or asshown in Fig. 5 one or more ribs 2| are provided in the interior of thecase, to maintain the battery or individual cells with its terminalcontact spaced slightly from the metal contact strip 6.

If desired, the metal strip 6 may carry a reflector for the lamp 5,which preferably then serves as the lamp holder.

I claim:-

1. Electric pocket lamp with removable battery comprising in combinationa case of insulating material, openings in said case, a flexible stripof metal arranged in the back end of the case, a flexible contact stripof metal provided with lateral lugs arranged in the forward end of saidcase and entering said openings, a screw-thread corresponding to thescrew-part of a lamp on said contact strip, a lamp passing through saidcase and screwed into said contact strip, and a switch secured to thecase and controlling the free end of said contact strip.

2. Electric pocket lamp with removable battery comprising in combinationa case with a removable lid, a cavity in said lid, a hole in the base ofsaid cavity, coinciding openings in the Walls of said case and said lid,a flexible strip of metal arranged in the back end of the case, aflexible contact strip of metal provided with lateral lugs arranged inthe forward end of said case and entering said openings, a screw-threadcorresponding to the screw-part of a lamp on said contact strip, a lampdisposed in said cavity and screwed into said contact strip, and aswitch secured to the case and controlling the free end of said contactstrip.

BENJAMIN DANIEL LIFSCHITZ.

